Question # 1

An Alpha particle is the same as

Choose an answer

A helium nucleus

A high speed electron

A hydrogen nucleus

Electromagnetic radiation of short wavelength

An emitter follower has

Choose an answer

High input impedance and high output impedance

High input impedance and low output impedance

Low input impedance and low output impedance

Low input impedance and high output impedance

Critical mass is the minimum mass needed for

Choose an answer

Fusion

H-Bomb

Chain reaction

Binding energy

Isotopes are the atoms of the same elements which contain equal number of.

Choose an answer

Nucleus

Neutrons

Protons

Electrons

The band width of an audio amplifier is.

Choose an answer

10 Hz to 10 kHz

20 Hz to 54 Hz

20 Hz to 20 kHz

20 Hz to 60 kHz

Radioactivity is the phenomenon associated with the.

Choose an answer

Transition of radiowaves

production of alpha particles only

Decay of nucleus

Reception of radio waves

Which type of radiation would be stopped completely by a thin piece of cardboard.

Choose an answer

Alpha particles

Beta particles

Gama rays

X -rays

Which configuration is used to connect high impedance source to a low impedance lead.

Choose an answer

CE

CB

CC

BE

Why is a capacitor resistor combination used in oscillators in grid circuit.

Choose an answer

To generate oscillation

To bias the grid automatically

To amplify oscillations

To sustain the oscillations.

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

Choose an answer

12 years

24 years

48 years

infinity

If an object moves with velocity of light the apparent length of the object moving the direction of motion becomes.

Choose an answer

Larger

Smaller

Zero

Infinity

The process of pair production will take place if the energy of photon is greater than.

Choose an answer

0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

Which of the following radiations can penetrate 20 cm thick steel.

Choose an answer

Alpha particles

Beta particles

Gama particles

Neutrons

The radius of second orbit of hydrogen atom is

Choose an answer

0.071 A

0.142 A

4.752 A

9.5298 A

The back ground radiation in the atmosphere on the average is

Choose an answer

0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

An operational amplifiers will act as an inverting amplifier when the input signal is connected to.

Choose an answer

Inverting terminal

Non inverting terminal

Earthened wire

Both a and b

The most suitable material for moderator in a nuclear reactor is.

Choose an answer

B

Cd

D2O

Uranium

The decay process in which an unstable nucleus splits into two fragments of comparable mass is known as.

Choose an answer

Nuclear fission

nuclear fusion

Radioactivity

Carbon dating

The gama rays have

Choose an answer

Thin tracks

Thick tracks

No definite tracks

Continuous tracks

What is the scale for measurement of Banbridge mass spectrograph.

Choose an answer

Linear

Inverse

Exponential

Logarithmic

Which one of the following gates in a a universal gate.

Choose an answer

OR

AND

NOT

NAND

More Classes

Other Links

PPSC Physics Chapter 7 Modern Physics MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer